Single and Combined Effects of Aged Polyethylene Microplastics and Cadmium on Nitrogen Species in Stormwater Filtration Systems: Perspectives from Treatment Efficiency, Key Microbial Communities, and Nitrogen Cycling Functional Genes DOI Creative Commons

Cong Men,

Zixin Pan,

Jiayao Liu

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(7), P. 1464 - 1464

Published: March 26, 2025

Microplastics and heavy metal contamination frequently co-occur in stormwater filtration systems, where their interactions may potentially compromise nitrogen removal. Current research on microplastics Cd predominantly focuses soils constructed wetlands, with limited attention given to systems. In this study, the single synergistic effects of aged polyethylene (PE) cadmium (Cd) infiltration systems were investigated from perspectives removal, microbial community structures, predicted functional genes cycling. Results showed that PE demonstrated stronger inhibition NO3−–N removal than Cd. Low-level (PE content: 0.1% w/w) Cd-contaminated inhibitory effect high-level 5% w/w). The mean efficiency under combined Cd50 (Cd concentration: 50 μg/L) PE5 during sixth rainstorm event was 1.04 34.68 times other scenarios. Metagenomic analysis identified keystone genera (Saccharimonadales, Enterobacter, Aeromonas, etc.), critical transformation pathways (nitrate reduction ammonium, denitrification, fixation, nitrification) govern system performance. most pronounced nitrification/denitrification enzymes beyond nitrite oxidase nitrate reductase. These mechanistic findings advance our understanding co-contaminant

Language: Английский

Soil water, salt, and microplastics interact during migration: Performance and mechanism DOI Creative Commons
Xuguang Xing,

Haoxuan Feng,

Sihan Jiao

et al.

Geoderma, Journal Year: 2025, Volume and Issue: 455, P. 117229 - 117229

Published: Feb. 24, 2025

Language: Английский

Citations

0
Single and Combined Effects of Aged Polyethylene Microplastics and Cadmium on Nitrogen Species in Stormwater Filtration Systems: Perspectives from Treatment Efficiency, Key Microbial Communities, and Nitrogen Cycling Functional Genes DOI Creative Commons

Cong Men,

Zixin Pan,

Jiayao Liu

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(7), P. 1464 - 1464

Published: March 26, 2025

Microplastics and heavy metal contamination frequently co-occur in stormwater filtration systems, where their interactions may potentially compromise nitrogen removal. Current research on microplastics Cd predominantly focuses soils constructed wetlands, with limited attention given to systems. In this study, the single synergistic effects of aged polyethylene (PE) cadmium (Cd) infiltration systems were investigated from perspectives removal, microbial community structures, predicted functional genes cycling. Results showed that PE demonstrated stronger inhibition NO3−–N removal than Cd. Low-level (PE content: 0.1% w/w) Cd-contaminated inhibitory effect high-level 5% w/w). The mean efficiency under combined Cd50 (Cd concentration: 50 μg/L) PE5 during sixth rainstorm event was 1.04 34.68 times other scenarios. Metagenomic analysis identified keystone genera (Saccharimonadales, Enterobacter, Aeromonas, etc.), critical transformation pathways (nitrate reduction ammonium, denitrification, fixation, nitrification) govern system performance. most pronounced nitrification/denitrification enzymes beyond nitrite oxidase nitrate reductase. These mechanistic findings advance our understanding co-contaminant

Language: Английский

Citations

0